Abstract:The purpose of this pilot study was to examine the immediate effects of a manual therapy technique called Inhibitive Distraction (ID) on active range of motion (AROM) for cervical fl exion in patients with neck pain with or without concomitant headache. A secondary objective of this study was to see whether patient subgroups could be identifi ed who might benefi t more from ID by studying variables such as age, pain intensity, presence of headache, or pre-intervention AROM. We also looked at patients' ability to identify pre-to post-intervention changes in their ability to actively move through a range of motion. Forty subjects (mean age 34.7 years; range 16-48 years) referred to a physical therapy clinic due to discomfort in the neck region were randomly assigned to an experimental and a control group. We used the CROM goniometer to measure pre-and post-intervention cervical fl exion AROM in the sagittal plane within a single treatment session. The between-group difference in AROM increase was not statistically signifi cant at P<0.05 with a mean post-intervention increase in ROM of 2.4° (SD 6.2°) for the experimental group and 1.2° (SD 5.8°) for the placebo group. We were also unable to identify potential subgroups more likely to respond to ID, although a trend emerged for greater improvement in chronic patients with headaches, lower pain levels, and less pre-intervention AROM. In the experimental group and in both groups combined, subjects noting increased AROM indeed had a signifi cantly greater increase in AROM than those subjects not noting improvement. In conclusion, this study did not confi rm immediate effects of ID on cervical fl exion AROM but did provide indications for potential subgroups likely to benefi t from this technique. Recommendations are provided with regard to future research and clinical use of the technique studied. N eck pain as well as headache types with a proposed cervical etiology or contribution are highly prevalent disorders. Doug lass and Bope 1 reported a point-prevalence for neck pain in the general population of 9%. They further noted a 1-month, 6-month, and lifetime prevalence of 10%, 54%, and 66%, respectively. In a cross-sectional population survey, Guez et al 2 found an 18% prevalence for chronic neck pain (>6 months' duration). Headache types associated with cervical spine dysfunction include tensiontype and cervicogenic headache, occipital neuralgia, and-to a lesser extent-migraine headaches 3 . Tension-type headache affects two-thirds of men and over 80% of women in developed countries 4 . For the general population, the prevalence of cervicogenic headache varies between 0.4% and 2.5%; in those with chronic headaches, prevalence may be as high as 15% to 20% 5 . Neck pain and headache are not only highly prevalent but also frequent reasons for patients to seek medical or physical therapy (PT) care. In the United States, neck pain accounts for almost 1% of all primary care physician visits 1 , and cervical spine diagnoses were the reason for referral in 16% of 1,...